focussable content before the menu
Some text before the menu
Back to (Not so) Simple ARIA Tree Views and Screen Readers
List items with nested links. List items have role="treeitem".
The tree list uses aria-activedescendant.
Focus moves to and stays on the tree list. It does not move through the tree nodes. Instead, arrow keys update the nodes' aria-selected attribute and the tree list's aria-activedescendant attribute. Pressing Enter or Space sets location to the href of the nested link whose id is referenced by aria-activedescendant.